Telephone-indicator.



'1 mama,

H. CHRISTENSEN. TELEPHONE INDICATOR.

APPLICATION FILED FEB. 1a, 1913.

Patented July 7, 19M

party line may u nec in 'woilzing order. Pun while it im own or in ihe csse the centi'el ofice the celled I ll; is present the common practice be ooniinue to El she cell bell until is eetcd rinsing; i ile, to secure a iresponse, l3 onus-es considerable loss of but in the case of i 'e ere This not on time so she party ceiling essai'ily when new:

with the "use of the ls.

l em. of 1 e number of devices known or return signal devices which ind eiihei" the operator izhe i the perky calling Wllflulfil" s line is 0 clear, or Whether particular ielepiifi these sign .1 devices indicate she con ion of she line and. also incliceie than; port 'ular teleohone has been reached. they do not indicate the ence of the party celled.

The object of the invention is to provide a signal system which can be set by she party in Whose oilice or dwel ing; the telephone. is loos his sysiem in the case of an individual line might be any form of signal which automatically sent over the line to the caller in the absence of the party celled. said signal being emboby mechanism operated by clisi e or i.

not

of the bell oi said iaeleplnme ct any time during his absence will at once through the operation of seid. device maize end break this normally open circuit ce'iis iiog the signal broken by the op- "ni E.

-. die 71L sevens; Wesnmenon.

ettcl s Icsiont.

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iei-ebyes once notiiz'ying the opeifeicr that fine psi-iv is 110%; at home, and consequently no is loss in repeated mgings oijphe is sectional elevation of corner portion of telenhone box the parts being shown in o )eraiive position.

line oifl ig. 1. Fig; 3is shoriz onsection on the line 5-3 of Fig. 1. Fig. i e diagrammatic View illustrating the relative position of certain disks placed in the respective telephones of a four party line, said disks being in normal position. Fig. 5 is similar view of. the same disks, when one hell has been rung. Fig. 6 is a similar view showing the positional? the when hells have been rung; ill will be understood that the number of bells Yong designates the cell number of "the telephones ei mnged onseid party line.

four As she interior co-nssruction of each teleupon the line is the same, s description of one will nnsvvei" for oil.

in the drawings, 1 i-eprese ts the telephone box, and it will be understood of course that the relative arrangement of the various parts may be changed to conform to;

various styles oi boxes, and it will also be understood that the size of the disks, and the number of portions into which each disk is supposed to be subdivided can vary with the number of parties upon the line. The drawings and the descriptibn hereafter given illustrate a line having four subscribers.

The usual bells 2 carried by the box e11? struck alternately by the vibrations of; a

hammer 3. These are the ordinary pants now in use. Mounted Within the box' are.

two disks 4 and 5 arranged at right angles to each other and provided with intermeshing pins 6, said pins being spaced, equidistant apart, and in a four party line there will be five pins. The disk lis simply an operating disk designed to aid 1n trensnnt:

from the hammer 3 to the signal ting motion 'lo effect this motion I controlling disk 5.

provide the hammer arm 7 and a rod 8 is slidebly mounted in a suitable bracket 9 and a light coil spring 10 lOBillS at; one end upon the bracket and at the other end. upon a suitable collar, flangev or other equivalent carried by the rod 8. This is a comparatively Week spring with ins newness my nsole.

he m; she central oifice to flesh on end. oil" 3 With a small knockersuiiicient strength to return the bar 8 to normal position afterv the hammer 3 has come to rest. The bar carries a pawl 11 which normally rests against one or the pins 6 of the disk 4:- Upon vibration of the hammer 8 the knocker arm? will strike the rod 8 throwing the same toward the disk 4i and the pawl will move the pin 6 causing rotation of the disk 4 one step, which in the case of a four party line is one-fifth of a. complete rotation. After the first blow of the kIiocker throwing the bar toward the disk a the tendency of the spring 10 will be to return-the arm but the rapid vibration of the'hammer will prevent complete return of the arm to normal position and the pawl 11. will therefore catch upon the next pin 6, thus preventing further rotation of he disk 4:. When the hammer 3 comes to rest the spring 10 can then more the bar 8 back to the position shown in Fig. 1, the pawl 11 lifting over the pin upon which it had caught on the return movement of the bar. The bar is therefor in position to give the disk another onetifth rotation when the bell is again rung.

As the pins 6 of the disks 4: and 5 intermesh it will be obvious that the step by step rotation of the disk 4 will also be imparted to the disk 5. The disk 5 has a segment out therefrom as indicated at 12, said segment comprising substantially one-fiith of the disk indicating one step in its rotation. The hammer 3 carries an arm 13 from which. depends a pendulum l lhaving at its lower end a contact block 15. The arm'l3 may be insulated in any desired manner from the hammerB. Leadii'ig into the telephone box are the two wires 14' of a signal circuit, said circuit extending to the central ofiice at which point any form of signal device, as

for example an electric light may be inserted in said circuit. As the use of such signal light in a circuit is well known it has not been considered necessary to illustrate the manner of arranging the said light in the circuit. This circuit 14: is normally open and the wire. or other conductors forming the circuit Within the teiephonc box are spaced apart and terminate adjacent the side of the disk 5 opposite the hammer 3.

Any suitable. form of operating rod 1.? is connected to'one member of the circuit, said rod 15 passing upwardly through the tele phone box whereby one oi" said circuit members may be drawn upwardly out of parallel relation with the other member, and a suitable bracket 16 or other device may be employed for holding the rod 15 in elevated position. The disk 5 is u-oi'ided with nu merals upon "its periphery, said numerals running-fromzero to V In the diagrammatic view I have placed these numerals upon the sides of the disks in order to more clearly show the operation.

called the will appear through said sight opening inall four of the telephones. When a party vibrations of the hammer 3 will as transmitted through the arm 13 to the pendulum 14 which will swing through the cut outsegmental portion of the diskosothat the contact plate 15 will strikellie ends of the members of the circuit l-l. Each contact made by the swinging pendulum will therefore complete the circuit through the signal device at the desk of the operator. If such signal is arranged to indicate the absence of the subscriber, which is the preferred form, the opvrator will upon receiving the signal ceaz-e ringingand at once nolil'y the calling party that the subscriber called cannot be reached. But upon the return of the party he will lift the rod 15 into the position shown in dotted lines in Fig. 1, thereby rendering the signal device inoperative since the contact pin 15 would now strike but one of the conductor members, and consequently the circuit would not be completed.

Referring to Figs. 4, 5 and 6 I have shown therein the normal second and fourth positions of the various disks It will be noted that in their normal positions the disks in all telephones on the line will have a solid portion at the top, which will be termed the zero position and the cipher will appear upon the periphery of the disk through the sight opening. These disks turn from right to left, and the open portion will upon the ringing of one hell he brought into position in the telephone of the subscriber Whose call is one ring so that the pendulum will swing through said open position and engage the circuit members 14". Of course if said subscriber is home the circuit will not be completed but if he should be absent the operator will be notified of that fact as above explained. the call is for the fourth party upon the line whose signal call four rings, the disks in all of the tele phones upon the line will upon the "fourth ring occupy the position shown in Fig. (3. After a. subscriber has been reached it is necessary for the operator to again ring a suiiicient number of times to clear the line or in other words to return the disks to normal position. For example if the subscriber whose signal call four rings has been called up, the operator will either after conversation has been finished or it has been ascertained. that said subscriber is not at home, give one more ring which will return all of the disks to the pgsition shown in Fig. i. lithe party whose signal call is one ring has been called and the disks are in the position shown in Fig. 5 the operator will ring four times to again bring the disks back to normal position as shown in. Fig. 4. What I claim is:--

1. In a telephone, the combination with a vibrating arm of a signal device, a rotatable disk having a cut-out portion a normally open circuit, and a freely swinging pendulum supported from said vibrating arm and adapted to swing through the opening in said disk and bridge the gap in said circuit.

2. The combination with a telephone having a vibrating call signal member, of a disk having a portion removed therefrom, a circuit making and breaking device supported from said vibrating member and adapted to swing through the cut out portion of said disk when said disk isflin a predetermined position, and means operated by miovement of said vibrating member for r0- tating said disk.

3. In a telephone box a vibrating signal member, a pendulum supported therefrom, a contact block carried by the pendulum, elecbetween the members of said circuit and said pendulum, said disk having a cutout portion, and means operatively connected to said vibrating member for moving the cut-out portion of said disk into alinement with the said pendulum and circuit members upon the sounding of said signal devices a predetermined number of times.

HANS CHIHSTENSEN. Witnesses:

Pmnnn BARNES, F. O MATHENY. 

